# Calibre vs ontime

> Two self-hosted projects, compared on the numbers selfhost.directory tracks live: score, popularity, release cadence and setup effort.

| | Calibre | ontime |
|---|---|---|
| Score | 83/100 ✓ | 60/100 |
| Rank in category | #1 of 19 in Ebook Management | #3 of 11 in Event Management |
| GitHub stars | 26 274 ✓ | 970 |
| Stars, last 30 days | +265 ✓ | +14 |
| Stable releases, 12 months | 18 ✓ | 17 |
| Latest release | v9.17.0 · 23 Oct 2026 | v4.15.1 · 28 Oct 2026 ✓ |
| Setup | Easy ✓ | Moderate |
| Official Docker image | No | Yes ✓ |
| License | GPL-3.0 | Other |
| Main language | Python | Typescript |

## Which one should you pick?

Calibre scores 83/100 against 60/100 for ontime, so it is the safer default.

Calibre ships more often: 18 stable releases in the past year, against 17 for ontime.

If you want the quickest setup, Calibre is easier to run; ontime needs more configuration.

Calibre is growing faster right now (+265 stars in 30 days).

## Details

- [Calibre](https://selfhost.directory/project/calibre) (markdown: https://selfhost.directory/project/calibre.md)
- [ontime](https://selfhost.directory/project/ontime) (markdown: https://selfhost.directory/project/ontime.md)

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Source: https://selfhost.directory/compare/calibre-vs-ontime